Investments don't work on imagination. You need objective projections.

That's 3.4 million visitors per year. And you believe this?

The HOF remains the attraction. The rest is an outlet mall with a hotel.

I think your imagination here is getting in the way; you imagining nothing but failure for absolutely no reason at all other than simply being illogically pessimistic.

It's a bit more than that, actually. For example, part of the stadium renovation would be making it multi-use, so expect it to be used for outdoor concert events as well. Regardless of whether you personally dislike the project, the improvements will attract more people. Cedar Point numbers? Probably not, but still significantly more people.